从可重复使用期内衣洗前和洗后的精液提取效率和回收
Caitlyn Spencer1, Catherine C Connon1, Sarah J Seashols-Williams1
1Department of Forensic Science, Virginia Commonwealth University, Richmond, Virginia, USA.
Journal of forensic sciences
|January 7, 2026
概括
可重复使用的月经内衣可以保留精液和DNA证据,即使在洗后. 在涉及这种新型证据的性侵犯案件中,全厚切割是生物样本回收的最佳选择.
科学领域:
- 法医科学 法医科学 法医科学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 性侵犯调查通常依赖于检测衣服上的精液.
- 可重复使用的月经内衣由于其材料组成和可洗性,对法医分析提出了独特的挑战.
研究的目的:
- 建立从可重复使用的月经内衣中回收精液和DNA的最佳方法.
- 评估洗对这些服装上的生物证据检测能力的影响.
主要方法:
- 模拟的性交后样本应用于三个品牌的月经内衣.
- 用替代光源 (ALS),酸酸酶,P30测试和DNA提取来分析样本.
- 研究了洗 (一次或两次) 对证据收集的影响.
主要成果:
- 在大多数品牌中,ALS对斑点检测无效,但酸酸酶测试在所有品牌中均呈阳性.
- 与单层测试相比,全深切割产生了最佳的生物样本回收.
- 从所有样本中获得精子回收和完整的短串重复 (STR) DNA 档案,即使在洗后也是如此.
结论:
- 建议切割全厚度,以最大限度地从月经内衣中恢复精子.
- 法医科学家应该小心,只依靠ALS来定位这些物品上的污点.
- 月经内衣可以保留以前的性接触的生物证据,即使在洗后,也可能存在二次传播或污染的潜在风险.
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